Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D213/79—Acids; Esters
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
  • A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
  • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
  • A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D213/81—Amides; Imides
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D213/81—Amides; Imides
  • C07D213/82—Amides; Imides in position 3
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
  • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
  • C07D213/83—Thioacids; Thioesters; Thioamides; Thioimides
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D405/00—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom
  • C07D405/02—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings
  • C07D405/04—Heterocyclic compounds containing both one or more hetero rings having oxygen atoms as the only ring hetero atoms, and one or more rings having nitrogen as the only ring hetero atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D409/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms
  • C07D409/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings
  • C07D409/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having sulfur atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
  • C07D471/02—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains two hetero rings
  • C07D471/10—Spiro-condensed systems
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D491/00—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
  • C07D491/02—Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
  • C07D491/10—Spiro-condensed systems

Definitions

• the present invention is concerned with novel herbicidally active isonicotinic acid derivatives and related furo-, thieno- and pyrrolo[3,4-c]pyridine-l(3H)-one, -thione and -imine compounds, compositions containing these compounds as active ingredients, and a method for controiing weeds, preferably selectively in crops of useful plants. Further the invention also relates to a process for making these novel compounds.
• the present invention is concerned with herbicidally active isonicotinic acid derivatives and related furo-, thieno- and pyrrolo[3,4-c]pyridin- 1 (3H)-one, -thione and -imine compounds having the formula
• R' is hydrogen, fluoro, hydroxy or a spiro-bond
• R 1 and R 2 arc each independentiy hydrogen, C 1-6 al kcyl or R 1 and R 2 together with the carbon atom to which they are connected form a spiro C 3-6 cycloalkyl group; or
• R' and R 1 form an extra bond
• R 3 and R 4 are each independently hydrogen or C 1-6 alkyl
• R 5 and R 6 are each independently hydrogen, halo, C 1-4 alkyl, C 1-4 alkyloxy,
• Q is O, S or NR 7 ;
• X is CH 2 , O, S, SO or NR 8 ;
• Y is O, S or NR 8 ;
• n 0, 1 or 2;
• E is O, S or NR 8 ;
• R 7 is 1,1-dimethyl-2-hydroxyethylor 2-methyI-2-fluoropropyl
• R 8 is hydrogen, C 1-6 -alkyl or 1,1-dimethyl-2-hydroxyethyl
• R 9 is hydrogen, C 1-7 alkyl, C 3-8 alkenyl, C 3-8 alkynyl, C 2-16 alkyloxy alkyl or
• R 10 is hydrogen, C 1-3 alkyl or 1,1-dimethyl-2-hydroxyethyl
• R 11 is hydrogen, C 1-3 alkyl or phenyl
• R 12 and R 13 each independently are hydrogen or methyl.
• the isonicotinic acid derivatives and the related furo-, thieno- and pyrrolo[3,4-c]pyridin1(3H)-one, -thione and -imine compounds of formula (I) are novel, except for
• the compounds of formula (I) are valuable selective herbicides in crops of useful plants, such as sugar beet, rape, soybeans, cotton, sunflower, cereals, especially wheat, barley, rye and oats, rice, both upland rice and paddy rice, and maize.
• crops of useful plants such as sugar beet, rape, soybeans, cotton, sunflower, cereals, especially wheat, barley, rye and oats, rice, both upland rice and paddy rice, and maize.
• crops of useful plants such as sugar beet, rape, soybeans, cotton, sunflower, cereals, especially wheat, barley, rye and oats, rice, both upland rice and paddy rice, and maize.
• a broad range of application rates can be employed, preferably if the rice crops are transplanted rice crops, and if the compounds of formula (I) are applied after transplantation.
• the active ingredients (a.i.) of formula (I) are usually applied at application rates of 0.
• the application rates may exceed the above designated limitations.
• the preferred application rates are between 0.05 kg and 1.0 kg a.i. per hectare.
• alkyl denotes straight or branch chained saturated hydrocarbon radicals, e.g. methyl, ethyl, n.propyl, isopropyl, the butyl, pentyl, hexyl or heptyl isomers; alkyloxy defines methyloxy, ethyloxy, propyloxy or the four butyloxy isomers, with methyloxy, ethyloxy or isopropyloxy being preferred; halo is generic to fluoro, chloro, bromo or iodo, with fluoro and chloro being preferred; alkenyl defines e.g.
• alkynyl denotes e.g.
• cycloalkyl defines cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl or cycloheptyl, with cyclopentyl or cyclohexyl being preferred.
• Radicals that can be obtained from combination of groups defined hereinabove e.g. haloalkyl, alkyloxyalkyl or haloalkylcarbonyl are defined by the combination of the corresponding group member definitions. Important examples thereof are trifluoromethyl, chloromethyl,
• R 1 and R 2 radicals are attached to the same carbon atom.
• R 1 and R 2 together with this carbon atom may form a spiro-ring structure.
• a typical example of such spiro-rings are cyclopropane, cyclopentane, cyclohexane and cycloheptane.
• the invention also comprises the salts which the compounds of formula (I) are able to form with organic or inorganic bases such as amines, alkali metal bases and earth alkaline metal bases, or quaternary ammonium bases, or with organic or inorganic acids, such as mineral acids, sulfonic acids, carboxylic acids or phosphorus containing acids.
• organic or inorganic bases such as amines, alkali metal bases and earth alkaline metal bases, or quaternary ammonium bases
• organic or inorganic acids such as mineral acids, sulfonic acids, carboxylic acids or phosphorus containing acids.
• salt-forming mineral acids are hydrofluoric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, nitric acid, chloric acid, perchloric acid or phosphoric acid.
• Preferred salt-forming sulfonic acids are toluenesulfonic acid, benzenesulfonic acid, methanesulfonic acid or trifluoromethane sulfonic acid.
• Preferred salt-forming carboxylic acids are acetic acid, triflu ⁇ roacetic acid, benzoic acid, chloroacetic acid, phthalic acid, maleic acid, malonic acid and citric acid.
• Phosphorus containing acids are the various phosphonous acids, phosphonic acids and phosphinic acids.
• Preferred salt-forming alkali metal hydroxides and earth alkaline metal hydroxides are the hydroxides of lithium, sodium, potassium, magnesium or calcium, most preferably those of sodium or potassium.
• suitable salt-forming amines are primary, secondary and tertiary aliphatic and aromatic amines such as methylamine, ethylamine, propylamine, isopropylamine, the four butylamine isomers, dimethylamine,
• quaternary ammonium bases are, in general, the cations of haloammonium salts, e.g. the tetramethylammonium cation, the trimethylbenzylammomum cation, the triethylbenzylammonium cation, and also the ammonium cation.
• the invention also comprises all stereoisomers of the compounds of formula (I). Unless otherwise mentioned or indicated, the chemical designation of compounds denotes the mixtures of all stereochemically isomeric forms. These mixtures contain all
• R 1 and R 2 are each independently hydrogen, C 1-6 alkyl or R 1 and R 2 together with the carbon atom to which they are connected form a spiro C 3-6 cycloalkyl group;
• Q is O or S;
• n is 0 or 1;
• L is COOR 9 , CONR 10 R 11 , CN, or a radical of formula
• R 8 is hydrogen or C 1-6 alkyl
• R 10 is hydrogen or C 1-3 alkyl
• R 11 is hydrogen or C 1-3 alkyl
• R 13 is hydrogen.
• Preferred compounds are those compounds of formula (I) wherein R represents
• R' is hydrogen, fluoro, hydroxy or a spiro-bond
• R 1 and R 2 are each independently hydrogon, C 1-6 alkyl or R 1 and R 2 together with the carbon atom to which they are connected form a spiro C 3- 6 cycloalkyl group; or R' and R 1 form an extra bond
• R 3 and R 4 are each independently hydrogen or C 1-6 alkyl
• R 5 and R 6 are hydrogen
• Q is O, S or NR 7
• X is CH 2 , O or S
• Y is O or NR 8
• n is 0 or 1;
• R 7 is 1,1-dimethyl-2-hydroxyethyl or 2-methyl-2-fluoropropyl;
• R 8 is hydrogen, C 1-6 alkyl or 1,1-dimethyl-2-hydroxyethyl;
• R 9 is hydrogen or C 1- 7 alkyl;
• R 10 is hydrogen, C 1-3 alkyl or 1,1-dimethyl-2-hydroxyethyl;
• R 11 is hydrogen, C 1-3 alkyl or phenyl.
• Particularly preferred compounds are those preferred compounds wherein R' is hydrogen or a spiro-bond;
• R 1 and R 2 are each, independently hydrogen or C 1-4 alkyl;
• R 3 and R 4 are each independently hydrogen or C 1-4 alkyl; Q is O; X is CH 2 or O; Y is O or NH; L is COOR 9 or CONR 10 R 11 ; R 9 is hydrogen or C 1-4 alkyl;
• R 10 is hydrogen or C 1-3 alkyl; and R 11 is hydrogen or C 3-3 alkyl.
• R' is hydrogen or a spiro-bond
• R 1 and R 2 are each independently hydrogen or C 1-4 alkyl
• R 3 and R 4 are each independently hydrogen or C 1-4 alkyl
• Q is O
• the most interesting compound of formula (I) is methyl 3-(2,3-dihydro-2,2-dimethyl- 1H-inden-1-yl)-4-pyridinecarboxylate.
• the compounds of formula (I) comprise the isonicotinic acid derivatives of formula (I-a)
• R is a radical of the formula
• R' is hydrogen, fluoro or hydroxy
• X, n, L, and R 1 to R 9 are as defined under formula (I).
• Typical examples are e.g.
• the compounds of formula (I) also comprise furo- and thieno[3,4-c]pyridin- 1 (3H)-one, -thione and -imine derivatives having the formula (I-b)
• Preferred compounds represented by formula (I-b) are :
• the compounds of formula (I) comprise thepy ⁇ rolo[3,4-c]pyridin-1(3H)-one derivatives having the formula (I-c)
• Preferred compounds represented by formula (I-c) are :
• the compounds of formula (I) can be prepared from 4-(4',4'-dimethyloxazolin2'-yl)pyridine of the formula
• R is as defined under formula (I).
• An example of such a compound is, e.g. spko[1-(2,2-dimethyl)indan]-1,3'(1'H)furo[3,4-c]pyridin-2'-(1,1-dimethyl-2-hydroxyethyl)imine, the synthesis of which is described in Example 1. Reactions of this type are described in, e.g. J. Org. Chem. 47 (13), 2633 (1982) and Tetrahedron 3, 337 (1978).
• the compounds of formula (I) can also be prepared from N, N-diisopropyl pyridin-4-carboxamide of the formula
• the isonicotinic acid derivatives of formula (I-a) wherein L is 1,1-dimethyl-2-hydroxyethylaminocarbonyl, said compound being represented by formula (I-f), can be prepared by catalytically hydrogenolyzing an iminolactone compound of formula (I-d) in a reaction-inert solvent
• the carboxylic acids of formula (I-g) can also be prepared from the corresponding spiro-lactone of formula (I-b-1) by catalytic hydrogenolysis in a reaction-inert solvent.
• Furo[3,4-c]pyridin-1(3H)-one and -thione compounds of formula (I-b-1) can be obtained by reacting an iminolactone compound of formula (I-d) in an acid aqueous environment at an elevated temperature following art-known procedures.
• the (thio)lactone of formula (I-b-1) may further rearrange to a (thio)carboxylic acid derivative wherein R' and R 1 form an extra bond.
• the compounds of formula (I-b-1) can also be obtained by reacting a compound of formula (I-e) wherein R(OH) is as defined hereinabove, in an acid aqueous environment at an elevated temperature following art-known procedures.
• the spiro-lactam and spiro-thiolactam compounds of formula (I-c) can be prepared by reacting spiro-lactone and spiro-thiolactone compounds of formula (I-b), with ammonia or an amine of the formula NH 2 -R 8 , wherein R 8 is as defined under formula (I) at a temperature between 250°C and 300°C, according to a method described in J. Am.
• the said reaction is preferably conducted in a closed reaction vessel, e.g. in a sealed thick-walled glass tube, in the presence of an excess of the amine compound.
• a closed reaction vessel e.g. in a sealed thick-walled glass tube
• the desired spiro-lactam and spiro-thiolactam compounds of formula (I-c) are accompanied by (thio)amides of formula (I-a-1), which can be separated from one another following art-known purification procedures.
• the reaction mixture can be cooled in a CO 2 (dry ice) /2-propanone bath.
• the catalytic hydrogenolysis of the compounds of formula (I-d) or (I-b-1) is performed by hydrogenation using native hydrogen.
• the latter is preferably prepared in a reaction- inert solvent, in the presence of a catalyst, by introduction of hydrogen.
• Said hydrogenolysis reaction is performed in a reaction-inert solvent such as, for example an alcohol or an ether, e.g. methanol, ethanol, isopropanol, dimethyl ether, 2,2'-oxybispropane, dioxane or tetrahydrofuran.
• the said catalyst is, for example, palladium-oncharcoal or platinum-on-charcoal.
• Both the reaction of the iminolactone compounds of formula (I-d) to furo[3,4-c]-pyridine-1(3H)one compounds of formula (I-b) and the reaction of the 1,1-dimethyl-2-hydroxyethylisonicotinic acid amide compounds of formula (I-f) to the corresponding isonicotinic acid derivatives of formula (I-g) are saponifications known in the art.
• the said saponification reactions are conducted in the presence of a strong 4-6 N mineral acid, at an elevated temperature.
• suitable mineral acids are hydrochloric acid, hydrobromic acid, sulfuric acid and the like. In order to reach the required elevated temperature, it is sufficient e.g. to boil the reaction mixture, preferably under reflux conditions.
• iminolactone alcohol is dissolved in a reaction-inert organic solvent, preferably a chlorohydrocarbon, and then mixed with an equimolar quantity of diethylaminosulf urtrifluoride (DAST).
• DAST diethylaminosulf urtrifluoride
• the slightly exothermic reaction has ceased, stirring is continued for a few more hours and the fluorinated reaction product can be isolated from the reaction mixture by procedures known in the art.
• the hydroxy group in the compounds of formula (I-e) can be converted into fluorine following the above described procedure, thus yielding a compound of (I-i) wherein R' is fluoro and the radical R may be represented as R(F) and L represents -CO-N(iPr) 2 .
• esterification of the nicotinic acid derivatives of formula (I-g) to the ester of formula (I-h) can be conducted by procedures known in the art, e.g. by boiling the acid with an excess of the required alkanol of formula (II) in the presence of an acid, e.g.
• N-oxide forms of the compounds of formula Q can conveniently be prepared by N-oxidation with an appropriate organic or inorganic peroxide such as, for example, hydrogen peroxide, perbenzoic acid, 3-chloroperbenzoic acid, tbutyl hydroperoxide and the like.
• suitable solvents for said N-oxidation reactions are, for example, water, alkanols, e.g. methanol, ethanol and the like, halogenated hydrocarbons, e.g.
• the selective herbicidal action of the compounds according to the present invention is observed both when used pre- and postemergence of the weeds. Therefore, these compounds can be applied successfully for both preventive and curative selective control of weeds in crops of useful plants.
• the compounds of formula (I), however, are preferably used preventively.
• the invention also relates to herbicidal compositions containing one or more inert carriers and, if desired, other adjuvants and as active ingredient a herbicidally effective amount of a compound of formula (I) as defined hereinabove. Further the invention relates to methods of controlling weeds by the application of the novel compounds to said weeds or to the locus thereof. In the method for controiing weeds according to the invention the compounds of formula (I) are used in unmodified form or, preferably, together with the adjuvants conventionally employed in the art of formulation.
• compositions i.e. the compositions, preparations or mixtures containing the compound (active ingredient) of formula (I) and, where appropriate, a solid or liquid adjuvant, are prepared in known manner, e.g. by homogeneously mixing and/or grinding the active ingredients with extenders, e.g. solvents, solid carriers and, where appropriate, surface-active compounds (surfactants).
• extenders e.g. solvents, solid carriers and, where appropriate, surface-active compounds (surfactants).
• Suitable solvents are aromatic hydrocarbons, preferably the fractions containing 8 to 12 carbon atoms, such as, alkylbenzene mixtures, e.g. dimethylbenzene mixtures or alkylated naphthalenes, aliphatic or alicyclic hydrocarbons such as paraffins, cyclohexane or tetrahydronaphtalene, alcohols such as ethanol, propanol or butanol, glycols and their ethers and esters, such as propylene glycol or dipropylene glycol ether, ketones such as cyclohexanone, isophorone or diacetone alcohol, strongly polar solvents such as N-methyl-2-pyrrolidone, dimethylsulfoxide or water, vegetable oils and their esters, such as rape, castor or soybean oil, possibly also silicon oil.
• alkylbenzene mixtures e.g. dimethylbenzene mixtures or alkylated naphthalenes
• the solid carriers used e.g. for dusts and dispersible powders are normally natural mineral fillers such as calcite, talcum, kaolin, montmorillonite or attapulgite.
• calcite calcite
• talcum kaolin
• montmorillonite kaolin
• attapulgite a highly dispersed silicic acid or highly dispersed absorbent polymers.
• Suitable granulated adsorptive carriers are porous types, for example pumice, broken brick, sepiolite or bentonite; and suitable nonsorbent carriers are materials such as calcite or sand.
• suitable nonsorbent carriers are materials such as calcite or sand.
• pregranulated materials of inorganic or organic nature can be used, e.g. especially dolomite or pulverised plant residues.
• suitable surface-active compounds are non-ionic, cationic and/or anionic surfactants having good emulsifying, dispersing and wetting properties.
• surfactants will also be understood as comprising mixtures of surfactants.
• Suitable anionic surfactants can be both water-soluble soaps and water-soluble synthetic surface-active compounds.
• Suitable soaps are the alkali metal salts, earth alkaline metal salts or unsubstituted or substituted ammonium salts of higher fatty acids (C 10 -C 22 ). e.g. the sodium or potassium salts of oleic or stearic acid, or of natural fatty acid mixtures which can be obtained e.g. from coconut oil or tallow oil. In addition, there may also be mentioned fatty acid methyltaurin salts. More frequently, however, so-called synthetic surfactants are used, especially fatty sulfonates, fatty sulfates, sulfonated benzimidazole derivatives or alkylarylsulfonates.
• the fatty sulfonates or sulfates are usually in the form of alkali metal salts, earth alkaline metal salts or unsubstitued or substituted ammonium salts and contain a C 8 -C 22 alkyl radical which also includes the alkyl moiety of acyl radicals, e.g. the sodium or calcium salt of lignosulfonic acid, of dodecylsulfate or of a mixture of fatty alcohol sulfates obtained from natural fatty acids.
• These compounds also comprise the salts of sulfuric acid esters and sulfonic acids of fatty alcohol/ethylene oxide adducts.
• the sulfonated benzimidazole derivatives preferably contain 2 sulfonic acid groups and one fatty acid radical containing 8 to 22 carbon atoms.
• alkylarylsulfonates are the sodium, calcium or triethanolamine salts of dodecylbenzene sulfonic acid,
• dibutylnaphthalenesulfonic acid or of a naphthalenesulfonic acid/formaldehyde condensation product
• corresponding phosphates e.g. salts of the phosphoric acid ester of an adduct of p-nonylphenol with 4 to 14 moles of ethylene oxide, or phospholipids.
• Non-ionic surfactants are preferably polyglycol ether derivatives of aliphatic or cycloaliphatic alcohols, or saturated or unsaturated fatty acids and alkylphenols, said derivatives containing 3 to 10 glycol ether groups and 8 to 20 carbon atoms in the (alifatic) hydrocarbon moiety and 6 to 18 carbon atoms in the alkyl moiety of the alkylphenols.
• non-ionic surfactants are the water-soluble adducts of polyethylene oxide with polypropylene glycol, ethylenediaminopolypropylene glycol containing 1 to 10 carbon atoms in the alkyl chain, which adducts contain 20 to 250 ethylene glycol ether groups and 10 to 100 propylene glycol ether groups. These compounds usually contain 1 to 5 ethylene glycol units per propylene glycol unit.
• non-ionic surfactants are nonylphenolpolyethoxyethanols, castor oil polyglycol ethers, polypropylene/polyethylene oxide adducts, tributylphenoxypolyethoxyethanol, polyethylene glycol andoctylphenoxypolyethoxyethanol.
• Fatty acid esters of polyethylene sorbitan such as polyoxyethylene sorbitan trioleate, are also suitable non-ionic surfactants.
• Cationic surfactants are preferably quaternary ammonium salts which contain, as
• the salts are preferably in the form of halides, methylsulfates or ethylsulfates, e.g. stearyltrimethylammonium chloride or benzyldi(2- chloroethyl)ethylammonium bromide.
• the surfactants customarily employed in the art of formulation are described e.g. in the following publications:
• the herbicidal compositions which are preferably employed in the method of the invention usually contain 0.1 to 99%, preferably 0.1 to 95% of a compound of formula (I), 1 to 99% of a solid or liquid adjuvant, and 0 to 25% preferably 0.1 to 25% of a surfactant
• the commercial forms of said herbicidal compositions are advantageously concentrates which can easily be diluted by the end user.
• compositions can also contain further additives, such as, stabilizers, e.g. optionally epoxidized vegetable oils (epoxidized coconut rape or soybean oil), defoamers, e.g. silicon oil, conservatives, viscosity regulators, binding materials, fillers and dung or other materials for special purposes.
• stabilizers e.g. optionally epoxidized vegetable oils (epoxidized coconut rape or soybean oil)
• defoamers e.g. silicon oil
• conservatives e.g. silicon oil
• active ingredient 1 to 9%, preferably 2 to 5 %
• surfactant : 5 to 30% preferably 10 to 20%
• liquid carrier 5 to 94% preferably 70 to 85%
• active ingredient 0.1 to 10%, preferably 0.1 to 1%
• solid carrier 99.9 to 90%, preferably 99.9 to 99%
• active ingredient 5 to 75%, preferably 10 to 50%
• surfactant 1 to 40%, preferably 2 to 30% Wettable powders
• active ingredient 0.5 to 90%, preferably 1 to 80%
• surfactant 0.5 to 20%, preferably 1 to 15%
• solid carrier 5 to 95%, preferably 15 to 90%
• active ingredient 0.5 to 30%, preferably 3 to 15%
• solid carrier 99.5 to 70%, preferably 97 to 85%
• Example 19 Composition examples for liquid active ingredients of formula (I)
• Emulsions of any required concentration could be produced from such concentrate by dilution with water.
• N-methyl-2-pyrrolidone 20% 5% - epoxidized coconut oil - - 1% 5% petroleum distillate (boiling range 160-190°C) - - 89% -
• Example 20 Composition examples for solid compounds of formula (I)
• silicone oil in the form of a 75%
• the finely ground active ingredient was intimately mixed with the adjuvants, giving a suspension concentrate from which suspension of any desired concentration could be obtained by dilution with water.
• Example 23 Herbicidal action for rice and water rice (paddy )
• the water weeds Echinochloa c rus galli andMono choriavag. Scirpus and Sagittaria were sown in a plastic container (60 cm 2 surface, 500 ml volume).
• the container is then filled with water up to the soil surface. After 3 days, the container was watered to such an extent that a water layer of 3-5mm covered the surface. Then, an aqueous emulsion of the test substance was squirted on the crops.
• the applied dosage corresponded to an amount of active material of 0.5 to 4 kg a.i. per hectare (amount of solution corresponds to 5501/ha).
• the plant container is then kept in the greenhouse in optimum

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• 1991
  • 1991-11-12 AU AU88586/91A patent/AU648359B2/en not_active Ceased
  • 1991-11-12 CA CA002095718A patent/CA2095718A1/en not_active Abandoned
  • 1991-11-12 WO PCT/EP1991/002142 patent/WO1992009577A1/en not_active Application Discontinuation
  • 1991-11-12 EP EP91919428A patent/EP0558521A1/de not_active Withdrawn
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• 1992
  • 1992-01-23 TW TW081100469A patent/TW207532B/zh active
• 1993
  • 1993-05-06 US US08/050,269 patent/US5369084A/en not_active Expired - Fee Related

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